Latch or lock bolt



Aug. 16, 1932. g, FROST ET AL 1,872,440

LATCH OR LOCK BOLT Filed Jan. 14, 1931 lnoenibr Horace; Z; {Fm s:

Charlc LT, roai flliomegi .10 the inside of the door.

Patented Aug. 16, 1932 UNITED STATES PATENT OFFICE CHARLES L. rnosr AND HORACE E. r 'ao's'r, or ennui) RAPIDsMIcHIGAN LATCH on Loci: new

Application filed January 14,1931. sem No. 508,628.

This invention relates to latch or look bolts and a simple and very economical yet practical means for actuating the same.

The construction which we have devised is Y r. available for the so-called screen door latch and likewise may be used for a door bolt such as a night bolt on doors which have actuating means mounted at the inner side of the door which can be operated only from It isa primary object and purpose of the present invention to provide a very economical and practical construction useful both with locks and latches and which is efficient and durable in service.

An understanding of the invention may be had fro-m the following description, taken in connection with the accompanying drawing, in which,

Fig. 1 is a fragmentary horizontal section .20 through a door equipped with our invention.

Fig. 2 is a side elevation of the latch or look bolt and its containing housing.

Fig. 3 is a transverse vertical section through the bolt and its housing substan- 2 tially on the plane of line 33 of Fig. 1,

and

Figs. 4 and 5 are elevations of the inner sides of two different forms of operating means for the bolt.

Like reference characters refer to like parts in the different figures of the drawing.

In the construction, a cylindrical housing 1 open at one end and closed at the other and preferably of sheet metal is used which,

3 at its open end, carries a face plate 2 of flat metal to lie against or be inset into the edge of the door in which the structure is installed. This cylindrical housing member has an opening 3 cut in one side as shown 1 p in Fig. 1.

5 beveled end is not provided but the bolt is of substantially the same cross section throughout its entire length; The bolt is guided. in the housing andheld from rotary movement through the provision of a longitudinal slot 6 in the'bolt into-which an in-; dentation 7 from the housing is made, thereby preventing a rotary movement of the bolt but permitting its free sliding movement. Adj acent. its inner end and preferably at'aside opposite'wh'ere the groove 6 is made, a transverse vertical slotf8 isniade, being readily spring 9 within the housing .1. seating against its closed end and bearing against the inner end the bolt'4 as best shown in Fig. 1. I This bolt with its housing and the spring described within the housing are installed in a door lO iby boring a cylindrical hole in- Wardly atthe free Jvertical edge of the door until the faceplate 2 comes against the edge of the door where it may be fastened thereto byscrews in the usual manner. Thedoor has an opening 11 made from one side there-: ofinwardly toward the housing to join with the opening 3 in the housing.

The manually operated means for operatopening 11therein.- -In-one form, that shown. in Figs. 1 and .4, an escutcheon plate 12 may .be secured to the door by screws or otherfastenings. At its: inner side and housed betweenit and the door isa lever 13 pivotally mounted at 14 between its ends on the plate and carrying a horizontal pin 15 at its upper end which passes through the openings 11 ing curved arms 17 and 18, the former of which is longer than the latter and the upper Y end of which engages against one side of the lever 13 above the pivot 14, while the upper end. f the shorter arm l8'engages against ing the bolt isconnected to the door over the r and3 and into the slot 8 in the bolt 4. An ir- I regularly shaped operating member 16 for the lever has two spaced apart upwardly extend:

the opposite side of the lever 13 below its pivot. The member 16 is secured to a pivot pin 19 passing through the housing plate 12 and rotatably mounted therein to which, at its outer end, an operating knob 20 is rigidly secured, whereby on rotating the knob in either direction, the lever 13 is swung from its full line position, shown in Fig. 4, to the dotted line position, thereupon moving the pin longitudinally of the housing 1 and Withdrawing the latch bolt 1 with a compression-of the spring 931 and. asl-soonias the knob is Telease'd'the spring '9- 'wi1lreturn the latch bolt to its normal outer position;-

In the -formr-o-f operatingmeans shown-in; Fig. 5, the escutcheon plate 120, is of a smaller size and the pin 15 which BHtGISithGCSlDiDB. of the bolt is carried by an arm 21 of flat metal directly conneoted to "'the-'-pivot- 19% With this form of operating, means the bolt I can: be retracte d only onturningthe knob 20 a straight arm pivotally mounted between its ends, means at one end of the arm engaging the bolt and a single movable means engaging with opposite sides of the arm upon opposite sides of the pivot whereby the arm will be moved in the same direction regard less of the direction of movement of said single movable means.

In testimony whereof we aflix our signatures.

CHARLES L. FROST. HORACE'E; FROST.

in one directions, Such: form of"operating means'is very" u'se ful butifor some urposes not'quite so"desirable'astthe'form s own'in Fig;etjinrwhichthe bolt is actuated irrespective of the directionof turning movement of I the knob20. I V v The construction-described is one of ia very I simple, yet durable and? practical"? nature.

The partsare economical to:make,: The bolt may be machined readily; 'to" produce both the groove-B- andithe slot 8and all ofl-the other parts are .of a simple nature 'andfcan, if

desired, be made readily 'fromsheetjmetal.

The invention is defined int-the appended claimsand is'to be considered,comprehensive of all forms of structure coming within their scope. V I

Weclaim: i V I 1'; In a construction-ofthe class dsoribed, an elongatedhousingv having, an" Opening through one'side, a bolt slijdably moun ted-l in the *housing having a transverse slot at its inner end portion located lILOOIljllIlCtiQIlf with said openingi'n the housing; spring means tendingto project thebolt outwardly, and I an operating mechanism for; th'eb'olt comprising, a plate, a. member pivotallymounted between its ends attheinner sidofi'the plate, a pin projecting from one endof the mem er ad pt dito pass. ough said: 'ope a 1 a reciproca-ble bolt and spring means to press the bolt in one direction the combination of, 

